Audiobus: Use your music apps together.

What is Audiobus? — Audiobus is
an award-winning music app for iPhone and iPad which lets you use
your other music apps together. Chain effects on your favourite
synth, run the output of apps or Audio Units into an app like
GarageBand or Loopy, or select a different audio interface output
for each app. Route MIDI between apps — drive a
synth from a MIDI sequencer, or add an arpeggiator to your MIDI
keyboard — or sync with your external MIDI gear.
And control your entire setup from a MIDI controller.

Video, rsTouch Pro For Reason, Setting Up And Getting Started

Brilliant surface controller for Reason now updated to control Reason 8. This makes it worthwhile getting Reason. And it has over 50 devices you can control including effects and you can also automate everything toohttp://www.thesoundtestroom.com/rstouch-pro-reason/

rsTouch Pro is alive and well. It has been continuously updated since its debut in 2012 and the current release, 2.9.0, fully supports Reason 10, including custom device interfaces for 130 Reason devices, Rack Extensions, and VSTs. We have information about the app here rsTouch Pro, and its sister app rsRemote.